I think the obx stuff is pretty good actually, i've read up on another forum that they are exactly the same profile/lift/duration etc as the skunk2 stage 2's.
Also my freind have recently fitted a OBX 4-2-1 header (which looked very good quality) to his h22a and a full mongoose exhaust. We got it dynoed yesterday and he pulled 209.4bhp and 155.6ftlb of torque. It had a very smooth power curve and made good power/torque all over the range.......a 20bhp increase with those mods is not to sniffed at.
Sometimes ppl just turn their noses up at the more reasonably priced things...